Fuel Pump Test

Step by step instructions on how to check an automotive fuel pump and pressure
regulator, this article pertains to most fuel injected vehicles.
Difficulty Scale: 4 of 10
Begin with the vehicle on flat ground, in park with the emergency brake on, engine
"OFF". (No smoking or open flame.)
Step 1 - Locate the vacuum line which is attached
to the fuel pressure regulator and remove it, this line should be free of fuel,
if fuel is observed the regulator has failed. (Note: Not all vehicles are designed
with a pressure regulator.)
Inspecting Vacuum Feed Line

Step 2 - Once the inspection for the fuel pressure
regulator is complete reinstall the vacuum line.
Reinstalling Fuel Line
Step 3 - Locate and remove the protective cap which
will allow the fuel pressure gauge hose to be attached.
Fuel Pressure Test Port
Step 4 - Next, remove the fuel pressure test gauge
from its packaging. The gauge shown is a professional gauge kit, but any attachable
fuel pressure gauge will work.
Fuel Pressure Gauge
Step 5 - After fitting the gauge with the appropriate
adapter attach the gauge line to the fuel test port. If no test port is provided,
a fuel filter adapter is needed, this adapter is connected to, or takes the place
of the fuel filter.
Connect Fuel Pressure Gauge